Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Face (par) amount of debt instrument at time of issuance.

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- Definition

The average effective interest rate during the reporting period.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount, after accumulated amortization, of debt discount.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of a type of municipal bond typically used to fund a development project. Also called special assessment limited liability bond, special district bond, special purpose bond, special tax bond and community development obligation. Interest owed to lenders is paid by taxes levied on the community benefiting from the particular bond-funded project. For example, if a bond of this sort was issued to pay for sidewalks to be repaved in a certain community, an additional tax would be levied on homeowners in the area benefiting from this project.

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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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NOTES PAYABLE AND SPECIAL ASSESSMENT OBLIGATIONS (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Debt	$ 17,707
Special Assessment Bond	3,051	$ 3,581
Community Facility District Bonds [Member]
Debt Instrument [Line Items]
Face Amount	3,700
Special Assessment Bonds [Member]
Debt Instrument [Line Items]
Special Assessment Bond	131
Face Amount	2,300
Secured Debt [Member] \| 50 Million Non-recourse Note Payable [Member]
Debt Instrument [Line Items]
Face Amount	$ 50,000
Stated rate (percentage)	7.25%
Interest rate during period (percent)		7.40%
Secured Debt [Member] \| 5.9 Million Note Payable [Member]
Debt Instrument [Line Items]
Face Amount	$ 0		$ 5,900
Stated rate (percentage)	5.50%
Variable rate (percent)	2.00%		2.00%
Interest rate during period (percent)	5.75%	5.50%
Unsecured Debt [Member] \| Legal Settlement [Member]
Debt Instrument [Line Items]
Face Amount	$ 0
Stated rate (percentage)	4.00%
Effective rate (percentage)	14.60%
Unamortized discount	$ 1,700	$ 2,100
Unsecured Debt [Member] \| Non-Revolving Credit Facility [Member] \| SRE Monarch Lending [Member]
Debt Instrument [Line Items]
Face Amount					$ 5,000
LIBOR [Member] \| Secured Debt [Member] \| 50 Million Non-recourse Note Payable [Member]
Debt Instrument [Line Items]
Variable rate (percent)	6.75%
Prime Rate [Member] \| Secured Debt [Member] \| 5.9 Million Note Payable [Member]
Debt Instrument [Line Items]
Variable rate (percent)	3.00%		3.00%
Minimum [Member] \| Community Facility District Bonds [Member]
Debt Instrument [Line Items]
Stated rate (percentage)	5.00%
Minimum [Member] \| Special Assessment Bonds [Member]
Debt Instrument [Line Items]
Stated rate (percentage)	6.00%
Minimum [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Variable rate (percent)	6.25%	2.00%
Maximum [Member] \| Community Facility District Bonds [Member]
Debt Instrument [Line Items]
Stated rate (percentage)	6.00%
Maximum [Member] \| Special Assessment Bonds [Member]
Debt Instrument [Line Items]
Stated rate (percentage)	7.50%
Maximum [Member] \| Prime Rate [Member]
Debt Instrument [Line Items]
Variable rate (percent)		8.00%
Discontinued Operations, Held-for-sale [Member]
Debt Instrument [Line Items]
Special Assessment Bond	$ 2,920	$ 3,581
Discontinued Operations, Held-for-sale [Member] \| Community Facility District Bonds [Member]
Debt Instrument [Line Items]
Special Assessment Bond	2,920	3,067
Discontinued Operations, Held-for-sale [Member] \| Special Assessment Bonds [Member]
Debt Instrument [Line Items]
Special Assessment Bond	0	514
Discontinued Operations, Disposed of by Sale [Member]
Debt Instrument [Line Items]
Debt	0	50,000
Less: Deferred Financing Costs of Notes Payable	0	(447)
Total Notes Payable, Net	0	49,553
Discontinued Operations, Disposed of by Sale [Member] \| Secured Debt [Member] \| 50 Million Non-recourse Note Payable [Member]
Debt Instrument [Line Items]
Debt	0			$ 50,000
Continuing Operations [Member]
Debt Instrument [Line Items]
Debt	14,787	14,046
Continuing Operations [Member] \| Special Assessment Bonds [Member]
Debt Instrument [Line Items]
Special Assessment Bond	131	0
Continuing Operations [Member] \| Secured Debt [Member] \| 5.9 Million Note Payable [Member]
Debt Instrument [Line Items]
Debt	5,940	5,940
Continuing Operations [Member] \| Unsecured Debt [Member] \| Legal Settlement [Member]
Debt Instrument [Line Items]
Debt	$ 8,716	$ 8,106